[indthkr]

Earth calling to Smart Tech Challenges Foundation:

Semiautomatic firearms are 100 year old technology that can probably be practiced in your basement with a modest investment in fabrication gear (including 3D printers).

Maybe for their next trick, Smart Tech Challenges will come up with biometric lock-out solutions for baseball bats and pointy dinnerware.

[Ruy Dias de Bivar]

How about the olden method of using just a file and a piece of railroad track? The firearm on the right was made with those two items. I have lots of other pictures of handmade guns if anyone is interested.

Then there those handmade Viet Cong handguns here.

http://www.forgottenweapons.com/other-handguns/viet-cong-1911-copy/